<?php
function outGrade($grades){
    asort($grades);
    $keys=array_keys($grades);
    //p($grades,$keys);
    $maxIndex=count($keys)-1;
    $minBh=$keys[0];
    $maxBh=$keys[$maxIndex];
    echo "打出最低分的裁判为:",$minBh,",打分为：",$grades[$minBh],"\n";
    echo "打出最高分的裁判为:",$maxBh,",打分为：",$grades[$maxBh],"\n";
    echo "最后得分为：", round((array_sum($grades)-$grades[$minBh]-$grades[$maxBh])/($maxIndex-1),2);
}
$grades=['一号裁判'=>98.2,
    '二号裁判'=>97.5,
    '三号裁判'=>91,
    '四号裁判'=>89,
    '五号裁判'=>99,
    '六号裁判'=>98.5,
    '七号裁判'=>96.6,
    '八号裁判'=>93.4,];
outGrade($grades);
